/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 07:15:36,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 07:15:36,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 07:15:36,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 07:15:36,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 07:15:36,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 07:15:36,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 07:15:36,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 07:15:36,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 07:15:36,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 07:15:36,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 07:15:36,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 07:15:36,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 07:15:36,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 07:15:36,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 07:15:36,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 07:15:36,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 07:15:36,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 07:15:36,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 07:15:36,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 07:15:36,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 07:15:36,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 07:15:36,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 07:15:36,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 07:15:36,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 07:15:36,445 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 07:15:36,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 07:15:36,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 07:15:36,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 07:15:36,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 07:15:36,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 07:15:36,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 07:15:36,451 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 07:15:36,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 07:15:36,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 07:15:36,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 07:15:36,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 07:15:36,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 07:15:36,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 07:15:36,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 07:15:36,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 07:15:36,459 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 07:15:36,498 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 07:15:36,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 07:15:36,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 07:15:36,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 07:15:36,503 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 07:15:36,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 07:15:36,506 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 07:15:36,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 07:15:36,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 07:15:36,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 07:15:36,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 07:15:36,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 07:15:36,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 07:15:36,509 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 07:15:36,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 07:15:36,510 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 07:15:36,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 07:15:36,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 07:15:36,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 07:15:36,511 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 07:15:36,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 07:15:36,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 07:15:36,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 07:15:36,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 07:15:36,513 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 07:15:36,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 07:15:36,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 07:15:36,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 07:15:36,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 07:15:36,540 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 07:15:37,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 07:15:37,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 07:15:37,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 07:15:37,144 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 07:15:37,145 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 07:15:37,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label24.c [2020-10-29 07:15:37,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3acdb6b00/45659839e4d3407a9cd91fda3f180527/FLAG0637959e8 [2020-10-29 07:15:38,492 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 07:15:38,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label24.c [2020-10-29 07:15:38,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3acdb6b00/45659839e4d3407a9cd91fda3f180527/FLAG0637959e8 [2020-10-29 07:15:38,888 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3acdb6b00/45659839e4d3407a9cd91fda3f180527 [2020-10-29 07:15:38,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 07:15:38,899 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 07:15:38,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 07:15:38,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 07:15:38,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 07:15:38,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 07:15:38" (1/1) ... [2020-10-29 07:15:38,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d5ba39e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:38, skipping insertion in model container [2020-10-29 07:15:38,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 07:15:38" (1/1) ... [2020-10-29 07:15:38,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 07:15:39,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 07:15:41,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 07:15:41,115 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 07:15:41,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 07:15:41,991 INFO L208 MainTranslator]: Completed translation [2020-10-29 07:15:41,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:41 WrapperNode [2020-10-29 07:15:41,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 07:15:41,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 07:15:41,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 07:15:41,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 07:15:42,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:41" (1/1) ... [2020-10-29 07:15:42,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:41" (1/1) ... [2020-10-29 07:15:42,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:41" (1/1) ... [2020-10-29 07:15:42,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:41" (1/1) ... [2020-10-29 07:15:42,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:41" (1/1) ... [2020-10-29 07:15:42,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:41" (1/1) ... [2020-10-29 07:15:42,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:41" (1/1) ... [2020-10-29 07:15:42,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 07:15:42,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 07:15:42,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 07:15:42,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 07:15:42,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 07:15:42,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 07:15:42,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 07:15:42,632 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 07:15:42,633 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 07:15:42,633 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 07:15:42,633 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 07:15:42,633 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 07:15:42,633 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 07:15:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 07:15:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 07:15:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 07:15:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 07:15:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 07:15:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 07:15:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 07:15:42,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 07:15:42,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 07:15:42,641 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 07:15:42,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 07:15:42,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 07:15:42,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 07:15:42,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 07:15:42,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 07:15:42,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 07:15:42,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 07:15:53,902 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 07:15:53,903 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 07:15:53,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 07:15:53 BoogieIcfgContainer [2020-10-29 07:15:53,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 07:15:53,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 07:15:53,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 07:15:53,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 07:15:53,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 07:15:38" (1/3) ... [2020-10-29 07:15:53,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615f31a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 07:15:53, skipping insertion in model container [2020-10-29 07:15:53,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:41" (2/3) ... [2020-10-29 07:15:53,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615f31a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 07:15:53, skipping insertion in model container [2020-10-29 07:15:53,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 07:15:53" (3/3) ... [2020-10-29 07:15:53,929 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label24.c [2020-10-29 07:15:53,948 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 07:15:53,957 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 07:15:53,976 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 07:15:54,022 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 07:15:54,023 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 07:15:54,023 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 07:15:54,023 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 07:15:54,023 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 07:15:54,023 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 07:15:54,023 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 07:15:54,024 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 07:15:54,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-29 07:15:54,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 07:15:54,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:15:54,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:15:54,087 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:15:54,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:15:54,097 INFO L82 PathProgramCache]: Analyzing trace with hash 383807154, now seen corresponding path program 1 times [2020-10-29 07:15:54,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:15:54,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165123000] [2020-10-29 07:15:54,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:15:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:15:54,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:15:55,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:15:55,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 07:15:55,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:15:55,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-29 07:15:55,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:15:55,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:15:55,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:15:55,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:15:55,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 07:15:55,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 07:15:55,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:15:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:15:55,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:15:55,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:15:55,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:15:55,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:15:55,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-29 07:15:55,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:15:55,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:15:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:15:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:15:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:15:55,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:15:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:15:55,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165123000] [2020-10-29 07:15:55,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:15:55,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 07:15:55,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792537630] [2020-10-29 07:15:55,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 07:15:55,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:15:55,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 07:15:55,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 07:15:55,378 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-29 07:16:13,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:16:13,777 INFO L93 Difference]: Finished difference Result 3123 states and 5754 transitions. [2020-10-29 07:16:13,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 07:16:13,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-29 07:16:13,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:16:13,825 INFO L225 Difference]: With dead ends: 3123 [2020-10-29 07:16:13,826 INFO L226 Difference]: Without dead ends: 1936 [2020-10-29 07:16:13,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 07:16:13,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2020-10-29 07:16:14,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1918. [2020-10-29 07:16:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2020-10-29 07:16:14,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2936 transitions. [2020-10-29 07:16:14,062 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2936 transitions. Word has length 36 [2020-10-29 07:16:14,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:16:14,064 INFO L481 AbstractCegarLoop]: Abstraction has 1918 states and 2936 transitions. [2020-10-29 07:16:14,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 07:16:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2936 transitions. [2020-10-29 07:16:14,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-29 07:16:14,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:16:14,075 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:16:14,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 07:16:14,076 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:16:14,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:16:14,078 INFO L82 PathProgramCache]: Analyzing trace with hash 880238061, now seen corresponding path program 1 times [2020-10-29 07:16:14,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:16:14,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997139545] [2020-10-29 07:16:14,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:16:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:14,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:14,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:16,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:16,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-29 07:16:16,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:16:16,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1910 [2020-10-29 07:16:16,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:16,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:16,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:16:16,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:16:16,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 07:16:16,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 07:16:16,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:16:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:16,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:16,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:16,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:16:16,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:16,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 07:16:16,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:16,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:16,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:16:16,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:16:16,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:16:16,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:16:16,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:16:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:16,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:16,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:16,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 07:16:16,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:16,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-29 07:16:16,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:16,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:16,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:16:16,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:16:16,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 07:16:16,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:16:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:16:16,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997139545] [2020-10-29 07:16:16,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:16:16,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:16:16,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379709254] [2020-10-29 07:16:16,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:16:16,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:16:16,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:16:16,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:16:16,633 INFO L87 Difference]: Start difference. First operand 1918 states and 2936 transitions. Second operand 7 states. [2020-10-29 07:16:43,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:16:43,418 INFO L93 Difference]: Finished difference Result 5685 states and 8808 transitions. [2020-10-29 07:16:43,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 07:16:43,419 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 112 [2020-10-29 07:16:43,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:16:43,445 INFO L225 Difference]: With dead ends: 5685 [2020-10-29 07:16:43,445 INFO L226 Difference]: Without dead ends: 3773 [2020-10-29 07:16:43,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:16:43,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3773 states. [2020-10-29 07:16:43,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3773 to 3661. [2020-10-29 07:16:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3661 states. [2020-10-29 07:16:43,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3661 states to 3661 states and 5428 transitions. [2020-10-29 07:16:43,585 INFO L78 Accepts]: Start accepts. Automaton has 3661 states and 5428 transitions. Word has length 112 [2020-10-29 07:16:43,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:16:43,587 INFO L481 AbstractCegarLoop]: Abstraction has 3661 states and 5428 transitions. [2020-10-29 07:16:43,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:16:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3661 states and 5428 transitions. [2020-10-29 07:16:43,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-29 07:16:43,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:16:43,597 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:16:43,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 07:16:43,597 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:16:43,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:16:43,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1559975830, now seen corresponding path program 1 times [2020-10-29 07:16:43,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:16:43,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296325824] [2020-10-29 07:16:43,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:16:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:43,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:43,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:44,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:44,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-29 07:16:44,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:16:44,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1316 [2020-10-29 07:16:44,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:44,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:44,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:16:44,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:16:44,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-29 07:16:44,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:16:45,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:16:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:45,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:45,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:45,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:16:45,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:45,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 07:16:45,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:45,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:45,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:16:45,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:16:45,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:16:45,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:16:45,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:16:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:45,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:45,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:45,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 07:16:45,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:45,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-29 07:16:45,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:45,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:45,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:16:45,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:16:45,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-29 07:16:45,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:16:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:16:45,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296325824] [2020-10-29 07:16:45,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:16:45,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 07:16:45,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844173931] [2020-10-29 07:16:45,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 07:16:45,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:16:45,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 07:16:45,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 07:16:45,449 INFO L87 Difference]: Start difference. First operand 3661 states and 5428 transitions. Second operand 8 states. [2020-10-29 07:16:47,921 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 07:17:16,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:17:16,636 INFO L93 Difference]: Finished difference Result 14267 states and 21902 transitions. [2020-10-29 07:17:16,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 07:17:16,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 126 [2020-10-29 07:17:16,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:17:16,711 INFO L225 Difference]: With dead ends: 14267 [2020-10-29 07:17:16,712 INFO L226 Difference]: Without dead ends: 10612 [2020-10-29 07:17:16,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-29 07:17:16,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10612 states. [2020-10-29 07:17:17,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10612 to 10544. [2020-10-29 07:17:17,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10544 states. [2020-10-29 07:17:17,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10544 states to 10544 states and 14559 transitions. [2020-10-29 07:17:17,144 INFO L78 Accepts]: Start accepts. Automaton has 10544 states and 14559 transitions. Word has length 126 [2020-10-29 07:17:17,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:17:17,145 INFO L481 AbstractCegarLoop]: Abstraction has 10544 states and 14559 transitions. [2020-10-29 07:17:17,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 07:17:17,146 INFO L276 IsEmpty]: Start isEmpty. Operand 10544 states and 14559 transitions. [2020-10-29 07:17:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-29 07:17:17,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:17:17,154 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:17:17,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 07:17:17,155 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:17:17,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:17:17,155 INFO L82 PathProgramCache]: Analyzing trace with hash -879015389, now seen corresponding path program 1 times [2020-10-29 07:17:17,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:17:17,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869908248] [2020-10-29 07:17:17,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:17:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:17,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:17,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:18,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:18,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-29 07:17:18,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:17:18,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1098 [2020-10-29 07:17:18,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:18,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:18,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:17:18,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:17:18,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-29 07:17:18,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:17:18,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:17:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:18,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:18,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:18,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:17:18,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:18,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 07:17:18,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:18,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:18,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:17:18,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:17:18,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:17:18,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:17:18,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:17:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:18,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:18,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:18,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 07:17:18,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:18,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-29 07:17:18,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:18,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:18,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:17:18,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:17:18,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-29 07:17:18,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:17:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:17:18,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869908248] [2020-10-29 07:17:18,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:17:18,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:17:18,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347830128] [2020-10-29 07:17:18,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:17:18,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:17:18,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:17:18,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:17:18,890 INFO L87 Difference]: Start difference. First operand 10544 states and 14559 transitions. Second operand 7 states. [2020-10-29 07:17:53,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:17:53,083 INFO L93 Difference]: Finished difference Result 31874 states and 46659 transitions. [2020-10-29 07:17:53,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 07:17:53,086 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 126 [2020-10-29 07:17:53,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:17:53,270 INFO L225 Difference]: With dead ends: 31874 [2020-10-29 07:17:53,271 INFO L226 Difference]: Without dead ends: 21336 [2020-10-29 07:17:53,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:17:53,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21336 states. [2020-10-29 07:17:54,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21336 to 21065. [2020-10-29 07:17:54,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21065 states. [2020-10-29 07:17:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21065 states to 21065 states and 28511 transitions. [2020-10-29 07:17:54,320 INFO L78 Accepts]: Start accepts. Automaton has 21065 states and 28511 transitions. Word has length 126 [2020-10-29 07:17:54,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:17:54,322 INFO L481 AbstractCegarLoop]: Abstraction has 21065 states and 28511 transitions. [2020-10-29 07:17:54,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:17:54,323 INFO L276 IsEmpty]: Start isEmpty. Operand 21065 states and 28511 transitions. [2020-10-29 07:17:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-29 07:17:54,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:17:54,326 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:17:54,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 07:17:54,327 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:17:54,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:17:54,327 INFO L82 PathProgramCache]: Analyzing trace with hash -781102522, now seen corresponding path program 1 times [2020-10-29 07:17:54,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:17:54,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875885654] [2020-10-29 07:17:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:17:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:54,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:54,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:55,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:56,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:56,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-29 07:17:56,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:17:56,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1969 [2020-10-29 07:17:56,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:56,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:56,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:17:56,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:17:56,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-29 07:17:56,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:17:56,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:17:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:56,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:56,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:56,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:17:56,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:56,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 07:17:56,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:56,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:56,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:17:56,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:17:56,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:17:56,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:17:56,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:17:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:56,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:56,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:56,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 07:17:56,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:56,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-29 07:17:56,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:56,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:56,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:17:56,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:17:56,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-29 07:17:56,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:17:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:17:57,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875885654] [2020-10-29 07:17:57,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:17:57,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 07:17:57,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184008031] [2020-10-29 07:17:57,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 07:17:57,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:17:57,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 07:17:57,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 07:17:57,216 INFO L87 Difference]: Start difference. First operand 21065 states and 28511 transitions. Second operand 8 states. [2020-10-29 07:18:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:18:27,320 INFO L93 Difference]: Finished difference Result 43696 states and 59821 transitions. [2020-10-29 07:18:27,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 07:18:27,324 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 129 [2020-10-29 07:18:27,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:18:27,408 INFO L225 Difference]: With dead ends: 43696 [2020-10-29 07:18:27,408 INFO L226 Difference]: Without dead ends: 22637 [2020-10-29 07:18:27,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 07:18:27,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22637 states. [2020-10-29 07:18:28,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22637 to 22192. [2020-10-29 07:18:28,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22192 states. [2020-10-29 07:18:28,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22192 states to 22192 states and 30235 transitions. [2020-10-29 07:18:28,193 INFO L78 Accepts]: Start accepts. Automaton has 22192 states and 30235 transitions. Word has length 129 [2020-10-29 07:18:28,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:18:28,194 INFO L481 AbstractCegarLoop]: Abstraction has 22192 states and 30235 transitions. [2020-10-29 07:18:28,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 07:18:28,194 INFO L276 IsEmpty]: Start isEmpty. Operand 22192 states and 30235 transitions. [2020-10-29 07:18:28,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-29 07:18:28,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:18:28,196 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:18:28,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 07:18:28,196 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:18:28,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:18:28,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1108152081, now seen corresponding path program 1 times [2020-10-29 07:18:28,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:18:28,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350429661] [2020-10-29 07:18:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:18:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:18:28,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:18:28,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:18:28,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:18:28,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-29 07:18:28,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:18:28,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 734 [2020-10-29 07:18:28,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:18:28,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:18:28,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 07:18:28,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:18:28,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-29 07:18:28,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:18:29,206 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 07:18:29,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:18:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:18:29,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:18:29,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:18:29,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:18:29,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:18:29,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 07:18:29,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:18:29,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:18:29,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:18:29,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:18:29,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:18:29,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:18:29,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:18:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:18:29,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:18:29,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:18:29,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-29 07:18:29,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:18:29,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-29 07:18:29,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:18:29,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:18:29,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:18:29,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:18:29,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-29 07:18:29,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:18:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 07:18:29,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350429661] [2020-10-29 07:18:29,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:18:29,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 07:18:29,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556454912] [2020-10-29 07:18:29,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 07:18:29,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:18:29,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 07:18:29,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 07:18:29,543 INFO L87 Difference]: Start difference. First operand 22192 states and 30235 transitions. Second operand 6 states. [2020-10-29 07:18:56,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:18:56,714 INFO L93 Difference]: Finished difference Result 60673 states and 88116 transitions. [2020-10-29 07:18:56,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 07:18:56,717 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2020-10-29 07:18:56,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:18:56,867 INFO L225 Difference]: With dead ends: 60673 [2020-10-29 07:18:56,867 INFO L226 Difference]: Without dead ends: 39290 [2020-10-29 07:18:56,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 07:18:56,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39290 states. [2020-10-29 07:18:58,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39290 to 39075. [2020-10-29 07:18:58,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39075 states. [2020-10-29 07:18:58,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39075 states to 39075 states and 54057 transitions. [2020-10-29 07:18:58,128 INFO L78 Accepts]: Start accepts. Automaton has 39075 states and 54057 transitions. Word has length 136 [2020-10-29 07:18:58,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:18:58,129 INFO L481 AbstractCegarLoop]: Abstraction has 39075 states and 54057 transitions. [2020-10-29 07:18:58,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 07:18:58,129 INFO L276 IsEmpty]: Start isEmpty. Operand 39075 states and 54057 transitions. [2020-10-29 07:18:58,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-29 07:18:58,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:18:58,132 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:18:58,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 07:18:58,133 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:18:58,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:18:58,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1565190007, now seen corresponding path program 1 times [2020-10-29 07:18:58,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:18:58,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511081062] [2020-10-29 07:18:58,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:18:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:18:58,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:18:58,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:18:59,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:19:01,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:19:01,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-29 07:19:01,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:19:01,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3755 [2020-10-29 07:19:01,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:19:01,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:19:01,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 07:19:01,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:19:01,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 190 [2020-10-29 07:19:01,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:19:02,110 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 07:19:02,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:19:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:19:02,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:19:02,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:19:02,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:19:02,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:19:02,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 07:19:02,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:19:02,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:19:02,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:19:02,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:19:02,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:19:02,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:19:02,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:19:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:19:02,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:19:02,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:19:02,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:19:02,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-29 07:19:02,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:19:02,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-29 07:19:02,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:19:02,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:19:02,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:19:02,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:19:02,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-29 07:19:02,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:19:02,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-29 07:19:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:19:02,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:19:02,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:19:02,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 07:19:02,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:19:02,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-29 07:19:02,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:19:02,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:19:02,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:19:02,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:19:02,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-29 07:19:02,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:19:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 07:19:02,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511081062] [2020-10-29 07:19:02,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:19:02,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 07:19:02,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339404065] [2020-10-29 07:19:02,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:19:02,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:19:02,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:19:02,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:19:02,878 INFO L87 Difference]: Start difference. First operand 39075 states and 54057 transitions. Second operand 7 states. [2020-10-29 07:19:03,040 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 07:19:06,370 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 66